Built for People

Garmin has all my data — so why did Runna build me a better training plan?

How a smartwatch romance turned into a UX intervention

Aug 8 • 

Angèle Lenglemetz

2

June 2025

The hidden growth machine in Revolut Pay

I booked a flight to Porto and paid with Revolut Pay, here's what actually happened.

Jun 26 • 

Angèle Lenglemetz

18

6

3

Monetising loneliness: Replika’s business and the chatbot intimacy playbook today

Whether we asked for it or not, chatbots are sliding into your DMs.

Jun 11 • 

Angèle Lenglemetz

6

2

3

April 2025

From free magic to paid value: a playbook for monetizing AI [Part 1]

AI is everywhere,from chatbots smoothing customer support to personalized recommendations. But while AI-powered tools are taking over the world, making…

Apr 8 • 

Angèle Lenglemetz

 and 

Beatriz Rusczyk Cunha

3

February 2025

The problem with Substack that no one talks about

Why so many Substack writers are just writing about Substack

Feb 18 • 

Angèle Lenglemetz

1,124

223

169

Building habit-forming apps: 4 cognitive biases you need to know (Part 2)

Following up on last week’s Part 1, we’re diving deeper into how cognitive biases shape user behavior in app development.

Feb 12 • 

Angèle Lenglemetz

12

1

Why you want what you can’t have: the psychology behind great apps - Part 1

Insights and examples from leading apps to optimise user interaction, engagement and retention.

Feb 4 • 

Angèle Lenglemetz

16

7

1

January 2025

Only 3 Seconds to Read This Before It’s Gone! (Just Kidding… Or Am I?)

Be honest—did you feel a little rush to read it faster?

Jan 21 • 

Angèle Lenglemetz

26

9

3

Meta and Spotify's AI takeover: the end of human-created content?

AI-generated content is quietly taking over playlists and feeds, reshaping the future of creativity while sidelining the artists and creators who built…

Jan 9 • 

Angèle Lenglemetz

38

24

9

Why ‘I knew it all along’ can cost you in the stock market

Did you know that after a market crash, more than 80% of investors believe the warning signs were “obvious”?

Jan 2 • 

Angèle Lenglemetz

7

1

1

December 2024

How Duolingo, Nike, and Amazon use rewards to keep you hooked

Why Duolingo turns streaks into addictive habits while Amazon’s badges gather dust

Dec 27, 2024 • 

Angèle Lenglemetz

34

14

2

Learnings from Tinder, Bumble and Hinge on using cognitive bias to improve your app engagement and monetisation

Have you ever found yourself trapped in the clutches of a painfully awkward and uncomfortable date? You’re not alone.

Dec 19, 2024 • 

Angèle Lenglemetz

18

3

2